<template>
    <div>
        <div class="search">
            <input v-model="keyword"  class="search-input"  type="text" placeholder="输入城市名或拼音">
        </div>
        <div 
            class="search-content"
            ref="search"
            v-show="keyword"
        >
            <ul>
                <li 
                    class="search-item border-bottom"  
                    v-for="item of list"
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data () {
        return { 
            keyword: '',
            list: [],
            timer: null
        }
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    watch: {
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer)
            }
            if (!this.keyword) {
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let  i in this.cities) {
                    this.cities[i].forEach((value) => {
                        if (value.spell.indexOf(this.keyword) > -1 || 
                            value.name.indexOf(this.keyword) > -1) {
                            result.push(value)
                        }
                    })
                }
                this.list = result
            }, 100)
        }
    },
    methods: {
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
        this.scroll = new BScroll(this.$refs.search)
    }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .search
        height: .72rem
        padding: 0 .1rem
        background: $bgColor
        .search-input
            box-sizing: border-box
            width: 100%
            height: .62rem
            padding: 0 .1rem
            line-height: .64rem
            text-align: center
            border-radius: .06rem
    .search-content
        z-index: 1
        overflow: hidden
        position: absolute 
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
        background: #eee
        .search-item
            line-height: .62rem
            padding-left: .2rem
            background: #fff
            color: #666

</style>